... data. BS 3643-2, Specification for selected limits of size. BS 3692, Specification for ISO metric precision hexagon bolts, screws and nuts. Metric units. BS 4190, Specification for ISO metric ... properties of fasteners. BS 6104-1, Specification for bolts, screws and studs. BS 6322, Tolerances for fasteners. BS 6322-1, Specification for tolerances for bolts, screws and nuts with thread ... nuts. BS 4395, Specification for high strength friction grip bolts and associated nuts and washers for structural engineering. BS 4395-1, General grade. BS 4921, Specification for sherardized...